地震勘探资料揭示郑州老鸦陈断层特征

断层活动性的探测研究是城市地震预测和防震减灾的基础性工作。为了查明郑州老鸦陈断层的位置、性质及其活动性,2006年底,在郑州市北郊横跨老鸦陈断层进行了不同探测深度的浅层地震勘探,通过采用爆破震源和可控震源相结合、不同观测系统参数相结合的工作方法,获得了探测深度30—6000m范围内的地下结构与构造图像。结果表明,老鸦陈断层为一条倾向NE、走向NW的正断层,该断层错断了新第三纪(N)以前的地层,在Q N地层内部没有发现断层引起的地层错断现象。

The Characteristics of Zhengzhou Laoyachen Fault Revealed by Seismic Exploration Data

In order to find out the location, characteristics and activities of Zhengzhou Laoyachen fault, the shallow seismic surveys at different exploration depths that are across Laoyachen fault in northern area of Zhengzhou city, were carried out in 2006. By using explosive and Vibrator seismic sources, the combined work methods of diverse observation geometry with different parameters are applied to obtain the subterranean structural and tectonic image in the depth ranging from 30 to 6000m. The results show that Laoyachen fault is a normal fault inclining to NE and trending in NW, which offsets the stratums before late Tertiary period. However, there are no fault displacement found in since then.